Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 6 x + 186 x^{2} + 582 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.481841061437$, $\pm0.617776524428$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.9423712.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $392$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is simple and geometrically simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
This isogeny class is ordinary.
| $p$-rank: | $2$ |
| Slopes: | $[0, 0, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $10184$ | $91737472$ | $831708307208$ | $7835660030009344$ | $73743494753772940424$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $104$ | $9746$ | $911288$ | $88509246$ | $8587466264$ | $832972620818$ | $80798282047496$ | $7837433609588734$ | $760231057471352264$ | $73742412689382443666$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 392 curves (of which all are hyperelliptic):
- $y^2=43 x^6+46 x^5+13 x^4+70 x^3+30 x^2+40 x+9$
- $y^2=40 x^6+52 x^5+43 x^4+66 x^3+11 x^2+56 x+89$
- $y^2=16 x^6+85 x^5+12 x^4+55 x^3+66 x^2+35 x+26$
- $y^2=64 x^6+75 x^5+5 x^4+24 x^3+26 x^2+64 x+33$
- $y^2=23 x^6+7 x^5+10 x^4+80 x^3+89 x^2+7 x+68$
- $y^2=11 x^6+19 x^5+75 x^4+74 x^3+59 x^2+73 x+31$
- $y^2=59 x^6+36 x^5+47 x^4+75 x^3+53 x^2+18 x+80$
- $y^2=44 x^6+93 x^5+50 x^4+33 x^3+77 x^2+79 x+87$
- $y^2=18 x^6+28 x^5+20 x^4+41 x^3+84 x^2+85 x+7$
- $y^2=x^6+51 x^5+67 x^4+19 x^3+32 x^2+x+59$
- $y^2=28 x^6+67 x^5+3 x^4+70 x^3+82 x^2+46 x+71$
- $y^2=88 x^6+84 x^5+48 x^4+19 x^3+12 x^2+28 x+95$
- $y^2=40 x^6+85 x^5+86 x^4+33 x^3+6 x^2+13 x+34$
- $y^2=91 x^6+10 x^5+28 x^4+39 x^3+87 x^2+48 x+21$
- $y^2=57 x^6+80 x^5+44 x^4+23 x^3+77 x^2+90 x+26$
- $y^2=35 x^6+68 x^5+82 x^4+18 x^3+52 x^2+45 x+90$
- $y^2=x^6+81 x^5+93 x^4+5 x^3+92 x^2+6 x+83$
- $y^2=88 x^6+77 x^5+34 x^4+95 x^3+51 x^2+54$
- $y^2=22 x^6+21 x^5+43 x^4+77 x^3+91 x^2+3 x+84$
- $y^2=43 x^6+3 x^5+72 x^4+18 x^3+36 x^2+11 x+50$
- and 372 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is 4.0.9423712.1. |
Base change
This is a primitive isogeny class.
Twists
Below is a list of all twists of this isogeny class.
| Twist | Extension degree | Common base change |
|---|---|---|
| 2.97.ag_he | $2$ | (not in LMFDB) |